Journal
OPTICS EXPRESS
Volume 21, Issue 18, Pages 21208-21217Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.21.021208
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Funding
- National Nature Science Foundation of China (NSFC) [61290312, 61205079, 61205048, 61106045]
- Program for Changjiang Scholars and Innovative Research Team in University (PCSIRT)
- Construction Plan for Scientific Research Innovation Teams of Universities in Sichuan Province [12TD008]
- 251 Talents Program of Sichuan Normal University
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Distributed Raman amplification (DRA) based on ultra-long fiber laser (UL-FL) pumping with a ring cavity is promising for repeaterless transmission and sensing. In this work, the characteristics (including gain, nonlinear impairment and noise figure) for forward and backward pumping of the ring-cavity based DRA scheme are fully investigated. Furthermore, as a typical application of the proposed configuration, ultra-long-distance distributed sensing with Brillouin optical time-domain analysis (BOTDA) over 142.2km fiber with 5m spatial resolution and +/- 1.5 degrees C temperature uncertainty is achieved, without any repeater. The key point for the significant performance improvement is the system could offer both of uniform gain distribution and considerably suppressed pump-probe relative intensity noise (RIN) transfer, by optimized design of system structure and parameters. (C)2013 Optical Society of America
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